Welcome to ChemZipper !!!: August 2020

Search This Blog

Iodine forms I3- but F2 does not form F3- ions. Why?

I2 because of the presence of vacant d– orbitals accepts electrons form 
I ions to form I3 ions but F2 because of the absence of d – orbitals does not 
accept electrons from F ions to form F3- ions.

Why the elements of the second row (first short period) show a number of differences in properties from other members of their respective families?

The differences in the properties of the first member of a group from those of the other members are due to 
(i) the smaller size of atom. 
(ii) presence of one inner shell of two electrons and 
(iii) absence of d – orbitals.

Why is nitrous oxide (N2O) used as an anaesthetic in dentistry?

N2O is used as an anaesthetic in dentistry because of its inertness.

Where is liquid nitrogen used for?

Liquid nitrogen is used as a refrigerant to preserve biological specimen, and also used for providing low temperature in super conductivity.

Why does H3PO3 acts as a reducing agent but H3PO4 does not?

H3PO3 contains one P H bond and hence acts as a reducing agent but H3PO4 does.

Related Questions:



Trisilyl amine, N(SiH3)3 is planar whereas trimethyl amines N(CH3)3 is pyramidal. Explain why?.














Which of the following is/are not known? PCl3, AsCl3, SbCl3, NCl5, BiCl5

(1) NCl5 (due to absence of d-orbitals)
(2) BiCl5 (Bi5+ being an oxidizing agent oxidizes Cl ion to Cl2 and Cl-ion being a reducing agent reduces Bi5+ to Bi3+).

Related Questions:



Trisilyl amine, N(SiH3)3 is planar whereas trimethyl amines N(CH3)3 is pyramidal. Explain why?.














Why bismuth has low m.p. while if going down the group m.p. increases?


This may presumably be due to more tendency of Bi to form three rather than five covalent bonds (inert pair effect). Thus there are weak forces of attraction between their atoms in solid state, accounting for its low m.p.

Related Questions:



Trisilyl amine, N(SiH3)3 is planar whereas trimethyl amines N(CH3)3 is pyramidal. Explain why?.
















Which element among group 15 elements has lowest boiling point?

Nitrogen (N2) 

Related Questions:



Trisilyl amine, N(SiH3)3 is planar whereas trimethyl amines N(CH3)3 is pyramidal. Explain why?.

















Why white phosphorous is stored under water?

White phosphorous is very reactive and will spontaneously inflame in air so it is stored under water.
Related Questions:



Trisilyl amine, N(SiH3)3 is planar whereas trimethyl amines N(CH3)3 is pyramidal. Explain why?.
















Which allotrope of phosphorous is used on top head of match stick?

Red Phosphorous is used on top head of match stick.

Related Questions:



Trisilyl amine, N(SiH3)3 is planar whereas trimethyl amines N(CH3)3 is pyramidal. Explain why?.














Why the first ionization energy of group 15 elements much higher than those of corresponding group 14 elements?

The first ionization energy of group 15 elements much higher than those of corresponding group 14 elements this is due to increase in nuclear charge and extra stable configuration of the elements of this group. The extra stability of configuration is attributed to the exactly half filled p – orbitals in their valence shells.
Related Questions:



Trisilyl amine, N(SiH3)3 is planar whereas trimethyl amines N(CH3)3 is pyramidal. Explain why?.















Top Search Topics